Engine-reverse gear.



- I. N. MITCHELL.

ENGINE REVERSE GEAR.

APPLICATION FILED NOV. 30, 1912.

1,085,463. Patented Jan. 27, 1914.

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I. N. MITCHELL.

ENGINE REVERSE GEAR.

APPLICATION FILED Nov. 30, 1912.

1,085,463. Patented Jan. 27,1914.

2 SHEETS-SHEET 2.

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pNiTED STATES PATENT onnron.

IR-A N. MITCHELL, OF WELLAND JUNCTION, ONTARIO, CANADA.

ENGINE-REVERSE GEAR.

To all whom, it may concern: Be it known that I, IRA, N. MITCHELL, asubject of the King of England, residing at \Velland Junction, in theProvince of Ontario, Dominion of Canada, have invented certain new anduseful Improvements in Engine-Reverse Gears; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to engine gears and more particularly toreversing gears for engines, the device consisting of means whereby a.machine, such as a traction engine or automobile, or in fact any similardrive mechanism can be propelled, forwardly or backwardly withoutchanging the direction of rotation of the fly wheel of the engine.

ith the above and other objects in View, the invention resides moreparticularly in the peculiar combination and arrangements of parts aswill be partly illustrated in the accompanying drawings and described inthe specification, although the invention is protected for all desirablechanges and uses within the scope of the invention as claimed.

Figure 1 is a side elevation of a portion of a traction engine havingthe invention applied thereto. Fig. 2 is an end elevation thereof. Fig.3 is a top plan view. Fig. 4 is a cross sectional view taken on the linel-4 of Fig. 3. Fig. 5 is a vertical longitudinal sectional view showingthe gearing in side elevation. F ig. 6 is a detail view of the reversinggears. Fig. 7 is a detail sectional view of a. peculiar gear wheelemployed with the device. Fig. 8 is a detail perspective view of ashifting lever also employed with the device.

For purposes of illustrating the preferred embodiment of the invention,a traction engine 10 is indicated, the same comprising a boiler portion11 supported upon the ground wheels 12 and 13 respectively. The rearwheels 12 are used for driving purposes and front wheels 13 for steeringpurposes, motion being imparted to the ground wheels 12 through themedium of a. drive shaft 14 mounted in bearings on the top of theboiler. At one end of the shaft 14 is a fiy wheel 15, the adjacent endof the shaft 14 carrying a clutch sleeve 16 and having engaged thereon asleeve 17 having a squared bore so that it will rotate with the sleeve16 which has a squared cross sectional outline and be Specification ofLetters Patent.

Application filed November 30, 1,912.

Patented Jan. 27,1914. Serial No, 734,298.

permitted to slide thereon. This sleeve 16 is connected to. the frictionshoes 18. cooperating with the fly wheelto regulate the speed of theshaft and the sleeve 17 is provided with beveled gears 19 and 20 whichhave their teeth disposed in opposite directions, this sleeve beingcapable of being shifted longitudinally on the sleeve; 16 by means of agrooved extension 21 on the in- Her end of the sleeve which is engagedby the bifurcated or slotted end 22 of a twisted arm 23 of an angularor. bell crank lever 24 which is pivoted at its angular portion on theboiler. The other arm 25 of the lever is connected by a rod 26 to anadjustable throw lever 27 the same being movable on a notched rack 28,preferably having three notches engageable by the spring dog 29 forholding the drive gear in its reverse positions or inoperative.Rotatably journaled vertically of one side of the boiler or body is a.shaft 30 having a beveled pinion 31 disposed between the gears 19 and 20and adapted when the latter are shifted through the means justdescribed, to engage either of the gears and thereby imparting rotationto the shaft 30 in opposite directions at different times.

The reversing or opposite rotation imparted to the shaft 30 is employedfor reversing the driving of the vehicle and for this purpose the lowerend of the shaft 30 carries a pinion 32 engageable with the gear teeth33 forming the beveled portion of a gear wheel 34 while the gear teeth35 at the peripheral edge of said gear wheel engage the gear 36 carriedby the adjacent drive wheel for imparting rotation to the latter. Ashaft 37 connects with the gear 34 and carries on its opposite end agear 38 meshing with a gear 39 secured to the opposite drive wheelwhereby said drive wheels are simultaneously driven.

From the foregoing description in connection with the accompanyingdrawings, it will be evident that when the lever 27 is in a'centralposition or engaged with the central notch of the rack, the gears 19 and20 will be both disengaged from the pinion 31 but, should the lever beshifted forwardly the machine will be driven in one direction byengagement of the gear 19 with the pinion 31 and by shifting the leverrearwardly, the gear 20 will be moved into engagement with the pinion 31causing a reversing of the direction in which the ground wheels aredriven and consequently the direction in which the vehicle is propelled.

I claim:

1. In an engine reverse gearing, the combination with a driving shaftand a driven shaft, of a sleeve on the drivin shaft, friction meansconnecting the shaft and sleeve to regulate the speed of rotation of thelatter, a second sleeve splined on the first-and having oppositelydisposed spaced gears, a third shaft rotatably supported and a pinion atone end disposed between the said gears, a connection between the thirdshaft and the driven shaft and means for shifting the sleeve to causeeither of the gears to mesh with the I inion.

2. In an engine reverse gearing, the combination with a drive shaft anddriven shaft, of a fly wheel on the drive shaft, a sleeve rotatable onsaid shaft, friction arms carried by the sleeve and engaging the flywheel upon lateral movement of the sleeve, means for laterally movingthe sleeve, a second sleeve splined on the first and provided withoppositely disposed spaced gears, a third shaft rotatably supportedand apinion at one end disposed between the gears, means for shifting thelast sleeve to cause either of the gears to mesh with the pinion and anoperative connectionbet-Ween the third shaft and the driven shaft.

In testimony whereof, I afiix my signature, in the presence of twowitnesses.

IRA N. MITCHELL.

IVitnesses A. BRISSON, ALEX. MOKEN ZIE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

